[YARN-6472] Improve Java sandbox regex

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha4
• Hadoop Flags: Reviewed
• Assignee: Greg Phillips
• Reporter: Miklos Szegedi
• Created: 12/Apr/17 15:01
• Updated: 28/Apr/17 18:36
• Resolved: 28/Apr/17 18:02

Description

I set the sandbox to enforcing mode. Unfortunately I was able to break out of the sandbox running native code with the following command:

        cmd = "$JAVA_HOME/bin/java %s -Xmx825955249 org.apache.hadoop.yarn.applications.helloworld.HelloWorld `touch ../../helloworld`" + \
              " 1><LOG_DIR>/AppMaster.stdout 2><LOG_DIR>/AppMaster.stderr"

$ ls .../nm-local-dir/usercache/root/appcache/
helloworld

Also, if I am not using sandboxes, could we create the nm-sandbox-policies directory (empty) lazily?